They’ve always been loony. The Liberals, I mean. We all know it. We’ve always known it. Many theories over the centuries, such as “They’re godless, so the Enemy owns them”. Close. Very close, but not concise enough.
It’s more than that. While that is true, the Enemy does own them, that’s not why they’re out of their minds and blind to the Truth the way they are.
Here’s why, in a nutshell: Romans 1:28-32. This scripture explains it clearly and perfectly. Read it for yourself:

Now you know. You choose now. “Seek the Lord with all your heart and lean not on your own understanding. In all your ways acknowledge him and he will make your paths straight.” Or be turned over to a depraved mind. It’s pretty simple really, and so is Romans 1:28-32. We all choose our paths. Some are led by God, and some are determined by Self-will. Your choice. I’ve made mine. Jesus it is.